A randomly selected value from a normal distribution is found to be 2.1 standard deviation above its mean (a)What is the probability that a randomly selected value from the distribution will be less than 2.1 (B) what is the probability that a randomly selected value from the distribution will be less than 2.1

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.